Drilling machine



Sept. 28, 1948. H. J. wlLLMo'rT 2,450,055

' DRILLING MACHINE Original Filed Aug. 4, 1943 V3 Sheets-Sheet 1 'Figi'Sept. L28, 1948. H. J. wlLLMoTT v DRILLING MACHINE Inventor Herbert dW'Zlmozt 5 Sheets-Sheet 2 Original Filed Aug. 4, 1945 I Sept. 28, 1948.H. J, WILLMOTT 2,450,065

DRILLING MACHINE -5 Sheets-Sheet A3 Original Filed Aug. 4. 1943 QS NSIllJ Patented Sept. 28, 1948 DRILLING MACHINE Herbert J. Willmott,Beverly, Mass., assignor to United Shoe Machinery Corporation, Fleminguton, N. J., a corporation of New Jersey Original application August 4,1943, Serial No.

497,415. Divided and this application December 21, 1944, Serial No.569,121

Claims.

My invention reilates to machines for drilling work of various kinds, itbeing herein disclosed as applied to the purpose of producingsimultaneously la plurality of passages in a Wood heel held in place inthe machine for the operation upon it. The present case is a division ofthe application led in my name in the United States Patent Ofce onAugust 4, 1943, and bearing the Serial No. 497,415, this having on July10, 1945, matured into Patent No. 2,379,944. The invention has as anAobject the provision of eicie'nt means for actuating, adjusting anddetermining the adjusted position of the drill or drills.

With the above object in view, a feature of the invention may be foundin means by which a drill-mounting is reciprocated to obtain the effectof the drills upon the Work in its holder. An oscillatory lever is heldagainst 'a rotatable cam by a spring, which forces the drill-mountingaway from the work-holder. A reciprocatory carrier connected to thelever, as by a pair of links, has spaced abutment-portions between whichthe mounting extends and with one of which it contacts. A second springengages one off the abutment-portions of the carrier and also themounting, it being effective by its expansion to move the mountingtoward the holder to cause the drills to enter the Work. There results acompalct organization by which the drills are yieldably advanced by anunvarying force and retracted at an runvarying rate, regardless of thedepth of drilling.` The advancing force may, however, be adjusted tomeet the requirements of dilerent kinds of Work by varying the distancebetween the elements engaged by the second spring.

As another feature of my invention, the depth of drilling is determinedby the operator through means for readily and accurately varying theposition of the drill-mounting with respect to the work-holder. Areciprocatory slide has movable upon it a secondary slide carrying themounting, and a rod rotatable in the second slide is threaded into therst and extends to the front of the machine, where it has a handleadjacent to the Work-holder. By turning this rod, and by virtue of itsengagement with the two slides,

the position of the second slide upon the rst and, therefore, the normalrelation of the drills to the work-holder, maybe altered quickly andwith little eiort, to give lthe depth of drilling desired by theoperator. Associated 'with the rod, where it may be observed readily, ismeans for-showing the depth of drilling, as by a nut threaded upon therod and movableV along indicating means, and, to render the readingeasy,

2 the indicating movement is multiplied, the two threads upon the rodbeing reversed in direction. As still another feature of the invention,there Vis lmeans by which the secondary or mountingcarrying slide issecurely locked in whatever position it may be adjusted. In Ways inwhich this slide is adjustable is a space, in which a block or othermember is movable into @locking engagement Withvthe slide. Means, as aspring, applies to the block a locking force which is independent ofeffort on the part of the operator, the action of the spring upon theblock being through a lever, rpreferably of the toggle-type, whichmultiplies its effect. There is shown means for adjusting the effectivepressure-angle ofthe toggle-lever. Means extending to the front of themachine, adjacent to the means through which the slide is moved, servesto release the slide-locking engagement, and may consist of a rodconnected to the lever and acting to break the toggle against the forceof the spring.

In the accompanying drawings illustrating a possible embodiment of theinvention,

Fig. l illustrates my improved drilling machine in side elevation;

Fig. 2 is a top plan View of the means for setting and clamping thedrilling head;

Fig. 3, a vertical sectional detail on thelline III--III of Fig. 2;

Fig. 4, an enlarged top plan View of the outer -end of the adjustingmeans for the depth of Agive arrangements corresponding toa particulai`design in which nails have been inserted in the heel-seat of a shoe towhich the drilled heel is to be attached; driving lmechanism B by whichthe drills are rotated through flexible and extensible connections Xpermitting drill-adjustment; clutch, cam and fan mechanism C inter- Uponspaced rods 50, 50, fixed horizontally fromfront to rear in the upperportion of the frame mechanism C, osci-llates said lever. A roll 66uponA the lever 62 engages the closed end of a thlmble EB, movablethrough a bore in a lug .lll depending from the slide 5ft. A spring l2is seated in the thimble 53 with its opposite extremity in an eX--ternally threaded thimble lll,y adjustable through.

an opening in the frame. By turning a nut'i upon the thimble M, theremay be varie-d the force with which the spring urges a flange I'Hi uponthe thimble ESS against the lug lil, and holds the vslide 55 in itsnormal position with the drills retracted. This position is determinedby the ,coni tour oi the cam .69, in engagement with which the roll Elis maintained by the spring. Between a lugl8 depending from the slideand a sleeve B sliding in the frame, a spring 82 is interposed. Thislast-mentioned spring is of such strength that it will resist the forcenecessary to advance thedrill-slide 54 for the production of the deepestopenings to be formed in the work. It is under constant compression, itsforce being adjustable by rotation of a screw 84 threaded into thesleeve and against which the` outer end of the yspring abuts. Theexpansive force of this loaded spring 82 maintain-s the lug t8 of theslide in contact with a horizontal crossbar 86, bridged between a pairYof links S8, 88 pivoted to the upper end of the leverv 62. At their rearextremities, these links are joined at Sil, 9E! to thesleeve 89. Thecrossbar, the links and the sleeve move at al1 times with the lever andmay be considered to be a portion thereof. They furnish a carrier forthe spring 82. As. the cam 8|) oscillates the lever 62, its action uponthe thimble 68 compresses the spring 12. This movement of the,lever-portion SIB in a direction away from the lug 7B permits the spring62, by its engagement with the lug, to move the slide .iforward, so .thedrills 58 act upon the work. If -any obstruction is encounteredby thedrills or slide which oiers a resistancegreater than the maximumdrilling force,` it merely causes the compression of the spring 82, andno injury to the elements of the machine will result. When the lever |32is allowed by the cam 69 tobe swung back by the expan-sion of the springl2, the slide 54 is retracted by the contact of the flange 1-5 with thelug 'Hl at a rate determined by the contour of the cam. This, andwithdrawal of the drill-s from the work, will be rapid, so heating byidlerotation of said -drillswithin the work is minimized. The time ofwithdrawal m-ay be a relatively small fraction of that required for theoperating advance. Since the lug I8 and crossbar 85 and the screw Si,which furnish the abutments for the opposite endsof the spring 82 movetogether with the lever 52, the resistance tocompression vof said springis `unaffected by the depth of drilling; The action of the drillsisvtherefore more uniform, and bo-th the springs-12 and'82 maybe of lessstrength th-an if 'the screw 84 were anormally fixed abutment. Since theoperating force is applied to the drills through the spring 62 and theyare retracted by the spring 12, their movement in both directions iscushioned and all shocks absorbed to give smooth reciprocation of themain slide 54.

To provide for drilling heels to dierent depths, the position of themounting head 5% upon the main slide 5S, is variable. For this purpose,the mounting is fast upon an intermedi-ate or secondaryslide 92 movablein ways 94 upon the main slide. Thel connection of the mounting to theslide 92 may be by screw-s Q5, which pass with some clearance throughopenings in the connected elements. Thus is furnished a transversesettingfup adjustment for the drills 58. At the underside of thesecondary slide is a lug 9S, in which-.turnsga.rodea-having collarsHill, ist xed toitat oppositesides of the lug7 and threaded into themain slide at 92, this thread being right- .hand When the rod is turnedby a hand-wheel I'Mupon' its-forward extremity, the secondary'slide-andthe mounting 5S with the drills are adlusted -todiierentinitial distances from the work, so the unvaried travel of the mainslide will carry the .drills into the werkte a greater or less.ex tent;The hand-wheel is at theqfront Of the ma chine, convenient formanipulation by the operator'a's he supplies to `the clamping mechanismD the rheelsto be drilled. In its adjusted position, theseccndary slideis locked by engagement of a block' H26, movable upon the main slide 5ithrough aA space at one side of the ways 94 and forced against thesecondary slide. This movement of the block is effected by atoggle-lever, one link |08 of--which is pivoted to it at l lll, theother link rI l2 beingpivoted to the iirst and also to th-em-ain'slideat H4. The pivot H4 is furnished by an eccentri-cywhichmayvbe rotated to differ-ent positions, and is'secured by a screw H6. This.to facilitate setting up `the machine and to take up weanpermitstheestablishment between the lin-ksyof the toggle-lever of an angle givingthe maximum or desired eiciency, when the block is in looking engagementwith the secondary slide. The center -of the l'toggle is forced towardan ladjustablestop-screw H8 into locking relation by anexpansion-springI 2B surrounding a rod |22 pivotedlto an arm |24 extending from thetogglelinky ll'above the link l I2. This locking a-ction is 'entirelyindependent of effort on the part of the operator and 'therefore isuniform. The spring isinterposed between a bracket |26 projecting fromthe-main slide and a shoulder |28 upon the rod.A To'unlock the slide Q2for adjustment, the rodV |22isdrawn out 'by a handle |353 at the frontoffrire-machine adjacent `to the hand-wheel lili, breaking the toggleand withdrawing the block |06 from its locking position, to which it hasbeen urged bythe spring |2.. With the secondary slide thus freed, themounting head 5-5 and the drills maybe-moved tothe desired positions byrotation of "the hand-wheel. Unless the rod |22 is drawn out while theadjustment is being made, the secondaryslide is at all times held lockedready for the drill-ing operation. As the block lll thus securesthe 'lsecondary slide, it forces said slide against the opposite side of thewaysv 94. In so doing; it takes up all lateral play and maintains-thes-drilsffinthe correct relation to the clamping mechanism C for alldepthofdrilling adjustrn'enizaf "Iotguide*theloperator` in making theadjust `ment -of'the drills, there projects from the mainslidez'dithrough .an opening in the frame about thezrod 198,Y a' tubel'f'terminating adjacent to the hand-wheel Ille; The tube iscut awayalong its-upper side, and'its edge is graduated at |345 in fractions :of.an inch. Guided in the tube along the graduated-opening is an elongatednut |36 engaging'- the rod 98.by a left-hand thread, the

reverse of that between the rod and the slide 54. A projection |38 fromthe nut into a longitudinal groove |40 in the tube prevents the rotationof said nut. As the rod 98 is turned to produce the adjustment of theslide 92 and the drill-mounting 56 on the main slide, the forwardextremity of the nut travels along the scale, indicating the depth ofdrilling for any setting. The reverse threading of the rod into the nutand the slide multiplies the indicating travel of the nut, so the scalemay have longer gradations and be more easily read. To allow anadjustment of the Zero position of this gaging device, the tube |32 isclamped in the main slide 54, with a capacity for longitudinaladjustment, by a wedge |42. The Wedge is guided in said main slide andbears against the tube. It is forced into locking engagement with saidtube by a screw |44 threaded into the wedge and rotatable in the` slide54.

In the use of the machine, a heel to be drilled is applied to theclamping mechanism D. If the drilling design is to be altered from thatof the previous operation, the arrangement of the drillchucks K ischanged by the mechanism A. If the depth to which the drills 58 are topenetrate the heel is also to be altered, theoperator actuates the rod|22, relieving the toggle-lever |08,'| i2 of the pressure of the spring|20, thus freeing the secondary slide 92 from the locking action of theblock |06. The hand-wheel ||34 is then turned until the readingfurnished by the relation between the nut |36 and the scale |34 showsthat the movement Iof the drills by the main slide 5G will carry them tothe desired depth in the clamped heel. Then, the rod is released tosecure the secondary slide upon the main slide under the force of thespring |20.v To whatever point the slide has been adjusted, the pressureof the locking block |06 holds it inthe true position in its ways,without the possibility of lateral play. Now, by depression of a treadle362, the clutch mechanism C and driving mechanism B are put intooperation for a single cycle, to rotate the chucks K and their drills58, and to turn the cam 6|) to oscillate the lever B2 and reciprocatethe main slidewith theadjusted drills. The drills are caused topenetrate the heel wholly under the expansive force of the loaded spring82, this being suilicient to effect the operation to the chosen depth,but providing for yield if an obstruction is encountered.

After the advance of the drills has been completed, they are withdrawnfrom the heel under the force of the spring 12 and at a rate determinedby the contour of the cam 60, the speed of movement being such as toprevent overheating during the idle travel of the drills in the heel.

The drilled heel may now be removed from the clamping mechanism.

Having described my invention; what I claim as new and desire to secureby Letters Patent of the United States is:

1. In a drilling machine, a frame, a' member slidable in the frame, aspring interposed between the frame and member, a lever against whichthe member is urged by the spring, a rotatable cam against which thelever is held by said spring, a sleeve guided in the frame, linksjoining the sleeve to the lever, a crossbar connecting the links, adrill-mounting movable upon the frame and havingr a portion engaging thecrossbar, and a spring interposed between the sleeve and mountingportionand acting to urge said mounting-portion against the crossbar.

2. In a drilling machine, a frame, a drillmounting movable upon theframe, a thimble variable in position in the frame, a thimble slidablein the' drill-mounting, a spring interposed between the thimbles and bywhich the slidable thimble is urged into actuating engagement with themounting, a lever against which'the slidable thimble is urged by thespring, a rotatable cam against which the lever is held by said spring,a sleeve guided in the frame, a screw threaded into the outer end of thesleeve, links joining the sleeve to the lever, a crossbar connecting thelinks and engaged by the mounting, and a spring interposed between thesleeve and mounting and acting to urge said mounting against thecrossbar.

,3. In a drilling machine, a work-holder, a slide movable toward andfrom the work-holder, means for reciprocating the slide, a second slidemovable upon the rst, a mounting carried by the second slide for. thereception ofV drills to act upon the work in the holder, a rod rotatablein the second slide and threaded into the first slide, said rodextending to the front of the machine at the Work-holder and beingprovided with a handle by whichr it may be turned to vary the positionof the second slide upon the first and the relation of the drills to thework-holder, and means surrounding the rod adjacent to the handle andmovable along said rod as the distance between the second slide and thework-holder is varied to indicatethe depth of drilling.

4. In a drilling machine, a work-holder, a slide movable toward and fromthe Work-holder, means for reciprocating` the slide, a second slidemovable upon the rst, a mounting carried by the second slide for thereception of drills to act upon the work in the holder, a rod rotatablein the second slide and threadedv into the first slide, said rodextending to the front of the machine at the work-holder and beingprovided with a handle by which it may be turned to vary the position ofthe second slide upon the first andthe relation of the drills to thework-holder, the rod being threaded adjacent to the handle, a tubeprojecting forwardly from the rst slide-and surrounding the rod, and anon-rotatable nut movable longitudinally within the tube and engagingthe thread at the handle, the nut and tube having co-operating meansindicating the depth to which the drills will enter the work in theholder.

5. In a drilling machine, a'work-holder, a slide movable toward and fromthe work-holder, means for reciprocating the slide, a second slidemovable upon the iirst, a mountingV carried by the second slide for thereception of drills to act upon the work in th'e holder, a rod rotatablein the second slide and threaded into the rst slide, said rod extendingto the front of the machine at-the work-holder and being provided with ahandle by which it may be turned to vary the position of the secondslide upon the rst and th'e relation of the drills to the Work-holder,the rodV adjacent to the handle having upon it a thread which is thereverse of that between th'e rod and the secondv slide, a tubeprojecting forwardly from the rst\slide and surrounding the rod, and anonrotatable nut movable longitudinally within the tube and engaging thethread at the handle, the nut and tube having co-operating meansindicating the depth to which the drills will enter the work in theholder.

6. In a drilling machine, a work-holder, a slide movable toward and fromthe work-holder, means for reciprocating the slide, a second slidemovable upon the rst, a mounting carried by thesecond slide for thereception oi .irills to act upon the work in the holder, a rod rotatablein the second accadde slide and. threaded .'.into-:theiflrst: slide;l:said-,1 rod' extending to'. thev fronttof" the' machine at* theWorkzholder and being: provi'dedll with; a .handle byfwhich '.it` may be.turned .tov vary-the.; position ofrthe .second rslide* uponpth'e ,'rstandi the: relation offthe. drills,` to"A the work-holder; therrod' beingthreaded adjacent: toy the handle; a tube proj ectingforwardly :fromtlie-=flrst slide and sur.; rounding the rod, a non-rotatable nutmovable longitudinally withinthe tub'ezand.l engaging the threadratthehandle, ther nut andztubef having Co-Qperating means indicating thedepth towhich the drills. Will enter the :workin the ,holden and meanstoclampntheftube-.n the-second slide .in different positions alongtherod to :vary the .relationzof the vportions of the'indicating'f'meansupon the'tube .and nut.

7. v.In .a drilling machine,.alworlholden a slide movable toward. andfrom the Workholder Vand provided with Ways Vinwhich .is la space, meansfor reciprocating the slide, asecond slide variable in .position in :theWays,. a: drill-mounting carried bythefsecond slidexto actA upon Workinthe holder, means'extendingtoth'e front of the-:machine atthevvorkeholder for Kmoving'theisecon'ol 'slide upon the :second slidetoact upon work in fthe holder, i

means: for moving the secondslide'upon th'erst to1vary the .relationofthe drillsto said'holder, ablockrniovable in the space in ,the-waysfor locking. .engagement with the second' slide, a lever pivoted tothefirst slide and to the b1ock,'a spring acting upon the lever toforcethe'block into lock` ing engagement With the .second slide, `and meansmovable by theoperator tofree the lever from the force-'of the spring.

9; In' adrillingfmachine, a workeholden a slide movable towardandlfromthe Work-holder and provided 'with ways inwhich is a space, meansforreciprocating the-slide, a second slide variable in positioninthegv/"ays,` va .drill-mounting icarriedflo'y thefsecond slideto actupon vvorlrin` the holder; means lfor.v moving the second 'slide' uponthe -flrs't to vary the relationof the drills to saidholden-a memberguided inthe space in the ways for locke ing engagement with the secondslide, a t0gg1eleverpivoted tothe first slide and to the block, a springacting uponthe toggle-lever to; .force the blockinto locking engagementwith thesecond slide, and' means for varying the position 'ofxthepivotal connection of the toggle-leverA to the first slide.Y andthereby, the effective pressure-angled said toggle-lever.

10'. ,Inxa drilling machine, a Workeh'olde131a1s1de movable toward andfrom the Work-holder:and providedwith Ways in which is a space, meansfor reciprocating the slide, a second slide variable in position inthe'ways, a drill-mounting carried'by thesecond slideto act upon work inthe xholder, means formoving the second slide upon'thesrlrst to: varythe relation of the drills to said holder, a block guided in the spacein the Ways for locking engagementwith the second slide, a"toggl'eele'ver pivoted tothe nrst slide and to the block, a' rodconnected to an armof the lever and extending toithe, front of themachine at the vvorkeholder.,l anda spring interposed between the [rodand the Vfirst slide and acting to straightenthe toggle The followingreferences are of record inthe file of vthis patent:

UNITED STATES PATENTS Number Name Date 611,811 Hormby Oct.'4, 18981,195,852 Purdy et al Aug. 22, 1916 1,210,450 Fox Jan. 2,.1917 1,237,017Buhr Aug. 14, 1917 1,255,114 Drach Jan. 29, 1918 V1,482,979 Fagan Feb.5, 1924 1,596,258 Tessky Aug. 17, 1926 1,693,253' Riddell Nov. 27,19281,858,898 Mesker May 1'7, 1932 .1,933,213 Guild Oct. 31, 1933 2,018,553Hallenbeck Oct. 22,1935 2,174,860 Montgomery Oct, 3', 1939 2,326,073Seyierth Aug. 3, 1943 2,349,324 Wiedmann May 23, 1944 FOREIGN PATENTSNumber Country Date 4,099 Great Britain Feb. 18, 1898

